1. The problem statement, all variables and given/known data David is travelling in his car (1500 kg) at 72 km/h. He sees a dog on the road and hits the brakes, what is the final temperature of his brake pads if they have a combined mass of 10 kg, a heat capacity of 300 J/kgC and they start at 20 degrees Celsius? 2. Relevant equations Q=mcT Change in T=T2-T1 3. The attempt at a solution I am wondering if i have done this right Ek=1/2mv^2 = 1/2*1500kg*20m/s^2 =300000 -3.0x10^5 J change in temperature =Q/mc =3.0x10^5 J/10 kg*300 J/kgC =100 degrees C 100+20=120 degress Celsius 120 is final temperature of break -Is this correct?